In administering a calcium channel blocker to a patient diagnosed with primary hypertension, the nurse understands this is due to which mechanism of action of this medication?

Blocks formation of angiotensin II, a potent vasoconstrictor

Blocks the action, not the formation, of angiotensin

Relaxes the smooth muscle of the blood vessels.

Decreases blood vessels ability to contract and cause vasoconstriction.

Answer and Explanation

The Correct Answer is C

A.   This is the mechanism of action of angiotensin-converting enzyme (ACE) inhibitors, not calcium channel blockers. ACE inhibitors work by preventing the formation of angiotensin II, a hormone that causes blood vessels to constrict.
B.   Calcium channel blockers do not directly affect angiotensin.
C.   This is the correct mechanism of action of calcium channel blockers. By blocking the influx of calcium ions into smooth muscle cells, these medications cause the blood vessels to relax and dilate, lowering blood pressure.
D.   Calcium channel blockers work by relaxing the smooth muscle of the blood vessels, which decreases their ability to contract and cause vasoconstriction.

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Correct Answer is C

Explanation

A. While yogurt is a nutritious food, it is not a significant source of iron.
B. Oranges are rich in vitamin C, which can help the body absorb iron from other foods. However, they are not a significant source of iron themselves.
C. Red meat, such as beef, lamb, and pork, is an excellent source of heme iron, which is easily absorbed by the body. This makes red meat a highly recommended food for people with iron deficiency.
D. Cashews are a good source of plant-based iron, but they also contain phytates, which can interfere with iron absorption. Therefore, while cashews can contribute to iron intake, they may not be as effective as red meat in addressing iron deficiency.

A. "We'll take his temperature every 4 hours." B. "We'll give him Tylenol for the pain." C. "We'll discard his toothbrush and buy another." D. "We'll continue to encourage him to drink lots of fluids."

Correct Answer is C

Explanation

A. While monitoring the child’s temperature is important for assessing fever and overall condition, it does not directly prevent the transmission of streptococcal infection. This response does not address methods to prevent spreading the illness to others.
B. Giving Tylenol (acetaminophen) can help relieve pain and reduce fever, which is important for the child’s comfort. However, this response does not address disease transmission prevention. It’s more about symptom management rather than infection control.
C. Discarding the toothbrush is a key infection control measure. Since the toothbrush can harbor bacteria from the throat, it’s essential to replace it after the child has been treated for streptococcal pharyngitis to prevent re-infection and reduce the risk of spreading the bacteria to others.
D. While encouraging fluid intake is important for recovery and can help soothe a sore throat, this response does not specifically address the prevention of disease transmission. It focuses more on the child’s care rather than controlling the spread of infection.

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In administering a calcium channel blocker to a patient diagnosed with primary hypertension, the nurse understands this is due to which mechanism of action of this medication?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is C

Explanation

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